Comparison

KL Serials vs OBDocker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KL Serials

This utility app measures various electrical parameters like voltage, current, and power. It also offers multiple protection functions, including over-voltage, over-current, and over-temperature alerts, while monitoring battery capacity in real-time.

Highlights
  • Measures voltage, current, power, and capacity
  • Monitors watt-hours and time
  • Over-voltage protection
  • Over-current protection
  • Over-temperature protection
  • Real-time battery capacity monitoring
  • Automatic current direction identification
Features
Read full description

The KL-F series volt-ampere meter is a new type of coulomb meter that can measure various physical parameters such as voltage, current, power, charge and discharge capacity, watt-hours, and time. At the same time, it can also set parameters to achieve over-voltage protection, under-voltage protection, Multiple protection functions such as over current protection, over power protection, and over temperature protection. The meter can automatically identify the direction of the current, and can monitor the battery capacity in real time.

About

OBDocker

This app acts as a professional OBD2 car scanner, enabling users to diagnose, service, and customize their vehicles. It offers comprehensive diagnostic modes, real-time data monitoring, and various service functions like oil resets and battery registration.

Highlights
  • Triple-mode diagnostics (Full-Systems, Multi-Systems, Quick Scan)
  • Triple-mode live data monitoring (Health, Engine, Dash)
  • Full-cycle service functions (Emissions Pre-Check, Control Tests, Oil Reset, Battery Registration)
  • One-click car setting adjustments and retrofits
  • Supports a wide range of car brands and models
Read full description

Crafted with user-friendliness and power in mind, OBDocker is a professional OBD2 car scanner app that empowers you to diagnose, service, and customize your vehicles with ease and precision. ************************* KEY FEATURES → Triple-Mode Diagnostics ○ Full-Systems Diagnose: One-Click OE-Level full-systems diagnostics. ○ Multi-Systems Diagnose: Scan multiple systems through ECUs filtering such as TMS, SRS, ABS, TCM, BCM and many more. ○ Quick Scan: Swiftly read and clear engine fault codes to maintain a smooth drive. → Triple-Mode Live Data ○ Health Monitor: Track every systems performance by diving into real-time parameters. ○ Engine Monitor: Monitor your engine's performance. ○ Dash Monitor: Visualize your vehicle's metrics in real-time. → Full-Cycle Service ○ Emissions Pre-Check: Test your emissions and pass with confidence before your official check. ○ Control Tests: Perform EVAP Leak Test, DPF and Inducement System Reinitialization. ○ Oil Reset: Easily reset oil change reminders and maintenance lights to keep your car's records up to date. ○ Battery Registration: Register the battery replacement to notify the battery management. → On-Click Modification ○ Adjustments: Adjust different car settings and customize them by one-click. ○ Retrofits: Easily adapt additional vehicle parts after installation. ************************* OBD ADAPTERS OBDocker requires a compatible OBD adapter to work. We recommend the following for the best experience: - High Performance: Vlinker Series, OBDLink Series, MotorSure OBD Tool, Carista EVO. - Middle Performance: All genuine adapters compatible with ELM327 / ELM329, including Veepeak Series, Vgate iCar Series, UniCarScan, NEXAS, Carista, Rodoil ScanX, and more. - Low Performance (Not Recommended): Cheep Chinese clones ELM. ************************* SUPPORTED CARS OBDocker is compatible with a wide range of vehicles, covering both standard and advanced modes: - Standard Mode: Universal compatibility with OBD2 / OBD-II or EOBD vehicles worldwide. - Advanced Mode: Toyota, Lexus, Nissan, infiniti, Honda, Acura, Hyundai, Kia, Volkswagen, Audi, Skoda, SEAT, Mercedes-Benz, BMW, Mini, Porsche, Ford, Lincoln, Chevrolet, Cadillac, GMC, Buick. And still working really hard to add more… ************************* PLANS: OBDocker offers a free trial for full feature access. To unlock unlimited potential, choose from our Pro or Pro Max subscriptions. NOTE: Vehicle ECUs vary in the amount of sensors supported. This app can’t show you something, that is not provided by your car. Terms and Conditions: https://www.obdocker.com/terms-and-coditions Privacy Policy: https://www.obdocker.com/privacy-policy Apple Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

KL Serials2 screens
OBDocker4 screens

Verdict

The call

The clearest difference is in-app purchases: KL Serials at none against OBDocker's 7. KL Serials also leads on rating (4.5 vs 4.2) and iOS requirement (9.0 vs 13.0). OBDocker's advantage is update cadence (fortnightly vs every 3 months) and ratings volume (17 vs 2). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. OBDocker sells 7 in-app purchases, starting at $2.99 per month. KL Serials asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

KL Serials holds the better App Store score, 4.5 against 4.2. That said, the two scores are not equally well evidenced: OBDocker has 17 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

KL Serials ships an update every 3 months, OBDocker fortnightly. The most recent releases landed on September 21, 2026 and September 27, 2026 respectively.

Scorecard6 real differences · 4 level
KL Serials versus OBDocker: the parameters behind the verdict, then further details
ParameterKL SerialsOBDocker
PriceFreeFree
Rating4.5 (2 ratings) — better4.2 (17 ratings)
Positive reviews—48.4% of reviews
Number of ratings217 — better
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size29 MB238 MB
Age rating4+4+
DeveloperHangzhou Junce Instruments Co., Ltd.Motorsure. Inc

Customer experience

KL Serials

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

OBDocker

All ratings17 ratings
Positive70.6%
Neutral17.6%
Negative11.8%
Written reviews31 reviews
Positive48.4%
Neutral6.5%
Negative45.2%

In-app purchases

None

KL Serials

No in-app purchases

7 purchases

OBDocker

Subscriptions6
  • OBD Pro (Monthly)$2.991 Month
  • OBD Pro Max (Monthly)$7.991 Month
  • OBD2 Pro (6 Months)$14.996 Months
Show 3 more
  • OBD Pro (Annual)7 Days trial$17.991 Year
  • Mechanic Access (Quarterly)$19.993 Months
  • OBD Pro Max (Annual)7 Days trial$47.991 Year
One-time1
  • OBD Pro Max (Permanent)$119.99

Questions

Is KL Serials free?
KL Serials is free to download, with no in-app purchases.
Is OBDocker free?
OBDocker is free to download, with in-app purchases available.
Which has better reviews, KL Serials or OBDocker?
KL Serials is rated higher. KL Serials averages 4.5 out of 5 from 2 ratings, while OBDocker averages 4.2 from 17 ratings.
Do KL Serials or OBDocker have ads?
Neither KL Serials nor OBDocker shows ads.
Which is updated more often, KL Serials or OBDocker?
KL Serials ships an update every 3 months, and OBDocker fortnightly. Most recently, KL Serials was updated on September 21, 2026 and OBDocker on September 27, 2026.

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